The left panel shows a monochromatic image of an eruption above the
east limb observed in O V 629 Å on 19 May 1998. Line profiles in three
spatial positions, A, B and C, have been marked and are displayed in
the panel to the right. The area marked C represents the average disk
profile with zero velocity. From the line shifts one can derive the
line-of-sight velocity of the emitting plasma.